Security forces inspect the site of a suicide attack in Kabul, Afghanistan, May 3, 2017 (AP photo by Massoud Hossaini).

U.S. President Donald Trump probably does not relish taking on a problem like the conflict in Afghanistan. It is a “wicked” problem, intricate and almost incomprehensibly complex, with a large and growing cast of participants playing a role or at least having a stake. Inside Afghanistan there is a mesh of actors with clashing, often incompatible goals. Outside the country a solution depends on Pakistan, which deeply fears India and has its own growing jihadi problem. Russia and the self-styled Islamic State, while late to the conflict, are now involved and muddling things even further. But despite all this, Trump […]